Prognostic and health monitoring systems for light features
First Claim
Patent Images
1. A light fixture comprising:
- at least one light fixture component;
at least one first sensor that measures a current or a voltage associated with the at least one light fixture component while the at least one light fixture component is operating;
at least one second sensor that measures at least one environmental parameter associated with the at least one light fixture component while the at least one light fixture component is operating; and
a prognostic and health monitoring (PHM) system coupled to the at least one first sensor and the at least one second sensor, wherein the PHM system;
analyzes a first plurality of measurements of the current or the voltage, as measured by the at least one first sensor while the at least one light fixture component is operating, in relation to a second plurality of time-correlated measurements of the at least one environmental parameter, as measured by the at least one second sensor while the at least one light fixture component is operating;
establishes ranges of acceptable values of the current or the voltage based on correlating the first plurality of measurements and the second plurality of time-correlated measurements over a time;
compares a first actual measurement of the current or the voltage, as measured by the at least one first sensor at a first subsequent time, to one of the ranges of acceptable values that correlates to a first particular value of the at least one environmental parameter measured by the at least one second sensor at the first subsequent time; and
predicts longevity of the at least one light fixture component based on comparing the first actual measurement to the one of the ranges of acceptable values.
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Abstract
A light fixture can include at least one light fixture component. The light fixture can also include at least one sensor that measures at least one parameter associated with the at least one light fixture component. The light fixture can further include a prognostic and health monitoring (PHM) system coupled to the at least one sensor, where the PHM system analyzes at least one measurement, made by the at least one sensor, to identify at least one factor that affects longevity of the at least one light fixture component.
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Citations
20 Claims
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1. A light fixture comprising:
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at least one light fixture component; at least one first sensor that measures a current or a voltage associated with the at least one light fixture component while the at least one light fixture component is operating; at least one second sensor that measures at least one environmental parameter associated with the at least one light fixture component while the at least one light fixture component is operating; and a prognostic and health monitoring (PHM) system coupled to the at least one first sensor and the at least one second sensor, wherein the PHM system; analyzes a first plurality of measurements of the current or the voltage, as measured by the at least one first sensor while the at least one light fixture component is operating, in relation to a second plurality of time-correlated measurements of the at least one environmental parameter, as measured by the at least one second sensor while the at least one light fixture component is operating; establishes ranges of acceptable values of the current or the voltage based on correlating the first plurality of measurements and the second plurality of time-correlated measurements over a time; compares a first actual measurement of the current or the voltage, as measured by the at least one first sensor at a first subsequent time, to one of the ranges of acceptable values that correlates to a first particular value of the at least one environmental parameter measured by the at least one second sensor at the first subsequent time; and predicts longevity of the at least one light fixture component based on comparing the first actual measurement to the one of the ranges of acceptable values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A prognostic and health monitoring (PHM) system for a light fixture, the system comprising:
a PHM engine that is configured to; receive a first plurality of measurements of a current or a voltage associated with a light fixture component of the light fixture, as measured by at least one first sensor over time, and a second plurality of time-correlated measurements of at least one environmental parameter, as measured by at least one second sensor over the time, while the light fixture component is operating; establish ranges of acceptable values of the current or the voltage based on correlating the first plurality of measurements and the second plurality of time-correlated measurements over the time; compare an actual measurement of the current or the voltage, as measured by the at least one first sensor at a subsequent time, to one of the ranges of acceptable values that correlates to a particular value of the at least one environmental parameter measured by the at least one second sensor at the subsequent time; and predict longevity of the light fixture component based on comparing the actual measurement to the one of the ranges of acceptable values. - View Dependent Claims (18, 19, 20)
Specification